Straightway valve



(No Model.) A.

W. C. JENNINGS. STRAIGHTWAY VALVE.

No. 596,885 Patented Jan. 4

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VILLIAM O. JENNINGS, OF OAMDEN, NEV JERSEY, ASSIGNORTO THE WAT- SON du MCDANIEL COMPANY, OF PHILADELPHIA, PENNSYLVANIA.

STRAIG HTWAY VALVE.

lSPE'.CIEFICA'LION forming part of Letters Patent No. 596,885, dated January 4, 1898.

Application led June 7,1897. Serial No: 639,722. (No model.)

To @ZZ whom it may concern,.-

Be it known that I, WILLIAM C. JENNINGS, a citizen of the United States, residingin Camden, New Jersey, have invented certain Improvements in Straightway Valves, of which the following is a specification.

One object of my invention is to so construct a straightway valve that it can be readily repaired at any time without cutting off the pressure, a further object being to pro- .vide simple and efcient means for moving the valve in the casing from one point to another and to arrest the movement at the proper points,-and a still further object being to insure the positive forcing of the valve-disks against their seats in the valve-casing or the positive withdrawal of said disks from constructed in accordance with my invention.

Fig. 2 is a transverse section, partly in elel vation, of the valve-chest and of the movable valve structure therein. Fig. 3 is a vtransverse section on the line x, Fig. 2. Fig. 4 is a view of a portion of the valve, showing the parts in a different position from that of Figs. 1 and 2; and Figs. 5 and 6 are detached views of parts of the operating mechanism of the valve.

The main casing or body 1 of the lvalve has opposite branches 2 2 with parallel bores at right angles to the bore of the chest, and surrounding the bores of the branches on the inside of the chest are annular valveseats 3.

To each end of the chest 1 is detachably secured a hood 4, each of these hoods having a stuffing-box plug 5 for the passage of a valverod 6, which valve-rods are connected to the opposite ends of the movable valve structure, which is guided so as to move across the valvechest, and comprises a central through-pas sage 7 and two valves, one on each side of said central through-passage.

Each valve comprises a pair of disks 9, facing outwardly and suitably guided in a transverse openin g of the valve structure, and each lof these disks has on the inner side inclined or beveled ways 10, having grooves l1 for the reception and guidanceof flanges 12 on the oppositelyprojecting Wings 13 of a nut 14E, which receives the threaded inner end of the valve-stem 6. Said valve-stem has a flange or collar 15, which is longitudinally confined to the movable valve structure by means of a detachable cap 1G at the end of the same, so that when said cap is in place the valvestem can turn independent-ly of the valve structure, but can have no independent lon gitudinal movement.

By the turning of the valve-stem the move ment of the nut let in the direction of the length of the valve struotu re can be effected, and the flanges l2 on the wings of said nut can thus be caused to act upon the beveled or inclined Ways at the back of the valve-disks 9, so as to either project or retract'said disks.

Each valve-stem Gis intended to have at its outer end a cap 17, presenting a squared or other-polygonal portion for the reception of a suitable implement, whereby the stem may be turned, and in addition to such cap 17 a block 19, with projecting lug 19, which serves by contact with the set-screw l7fL or other equivalent projection on the cap 17 to limit the turning movement of said cap, and hence of the valve-stem 6.

To one of the blocks 19 is connected one arm of a lever 20, said lever having another arm for the reception of a suitable operatinghandle and being fulcrumed upon the outer end of a link 21, which has therein two openings 22, to either of which may be adapted a pin 23, whereby the link is hung to a bracket 24 on one of the hoods 4 of the valve-casing.

Either pair of valve-disks may be used to close the passage through the valve-casing. As shown in Figs. 1 and 2 of the drawings, the lowest pair of disks is thus used, the rise of the valve structure being arrested when the disks are in line with the valve-seats 3 by reason of the contact of a shoulder 25 on the operating-lever 20 with the outer side of the hanger-link 21, as shown in Fig. l.

In order to open the passage through the valve, the movable valve structure Ais depressed until the through-passage 7 of the same is in line with the bores of the branches 2, further downward movement of the valve IOO being arrested when this position is reached by reason of the contact of a shoulder 26 on the operating-lever 2O With the inner side of the hanger-link 21, as shown in Fig. 4.

Vhen it is desired to use the upper pair of disks to close the passage through the valve-casing, the link 21 is shifted so that the pivot-pin 23 of the same occupies the upper opening 22 of the link, thereby moving the valve structure downward in the casing to the desired extent.

Before moving the valve structure to open the passage through the chest the disks 9 are retracted, so as not to interfere With the free movement of the valve, such retraction being, preferably, only to the limited extent necessary to bring the disks flush with the sides of the movable valve structure, as shown at the upper end of the latter in Fig. 2, so that no lodgment for dirt or scale is presented, the disks being again expanded when the valve structure has been moved, so as to bring said disks into position for being pressed against the seats 3 of the valve-chest.

The lug 19a on the block 19, acting as a stop for the projection 17a on the cap 17, prevents more than one turn of the valve-stem 6, this being sufficient to effect the desired expansion and contraction of the disks of the valve.

When either valve becomes defective for any reason, the valve structure is moved, so as to bring the other valve into position for closing the passage through the valve-chest, the defective valve being thereby moved into its correspondinghood at the end of the valvechest. The pressure being cut oif from the valve-chest this hood can then be removed so as to expose the valve, and if it becomes necessary to withdraw the disks from the valve this can be effected by removing the cap 16 from the end of the valve struct-ure, so as to permit of the unscrewing of the valverod G from the nut 14, whereupon the disks and nut can be readily withdrawn laterally and after the desired repairs have been made can be readily reinserted prior to the reintroduction of the valve-stem and the reapplication of the cap 16. The hood is then again secured to its place on the valve-chest, so as to restore the parts to their' original condition.

The means which I employ for imparting reciprocating movement to the valve structure and for projecting and retracting the disks of the valve may be used in structures having but a single valve instead of the pair of valves which I have shown and described, and the pair of valves may be used without the central through-bore, but the construction shown is preferred.

Having thus described my invention, I claim and desire to secure by Letters Patentl. The combination of a valve-chest having at each end aremovable hood,with a valve structure movable across the valve-chest and having a plurality of valves, each provided with laterally expansible and contractible disks, substantially as specified.

2. The combination of a valve-chest having removable end hoods with a valve structure movable across said chest and having a central through-bore, with a valve on each side of the same, whereby the iioW through the chest is permitted when the valve structure is in an intermediate position', but is cut off when said valve structure is in either of its extreme positions, substantially as specified.

3. The combination of a valve-chest having removable end hoods, with a valve structure movable across said chest and having a central through-bore, and on cach side of the.

same a valve having laterally expan sible and contractible disks, substantially as speciiied.

4. The combination of the valve having an outwardly-facing disk guided so as to move transversely across the valve and having on the inner side an inclined guide 0r Way with groove therein, a nut having a wing with flanges adapted to said grooved or inclined way, and a valve-stem threaded for adaptation to said nut, said valve-stem being lon gitudinally confined to the valve but free to turn therein, substantially as specified.

5. The combination of the valve-chest, a valve structure movable across the valvechest and having a central through-bore and a valve on each side of the same, a lever connected to the stem of the valve, and a link whereby said lever is hung to the valve-casing, said link having tWo openings for the reception of the fulcrum-pin,whereby the link may be shifted, substantially as specified.

In testimony whereof I have signed my name to this speciiication in the presence of two subscribing Witnesses.

WILLIAM C. JENNINGS. IVitnesses:

F. E. BEcHToLD, WILL. A. BARR.

IOO 

